grep: for -L, exitcode 0 means files *without* matches were found, closes 13151

This is a recent change in GNU grep as well (after 3.1)

function                                             old     new   delta
grep_file                                           1215    1228     +13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/testsuite/grep.tests b/testsuite/grep.tests
index e38278810..66498a989 100755
--- a/testsuite/grep.tests
+++ b/testsuite/grep.tests
@@ -96,6 +96,14 @@ testing "grep -x -F (partial match 1)" "grep -x -F foo input ; echo \$?" \
 testing "grep -x -F (partial match 2)" "grep -x -F foo input ; echo \$?" \
 	"1\n" "bar foo\n" ""
 
+# -L "show filenames which do not match" has inverted exitcode (if it printed something, it's "success")
+testing "grep -L exitcode 0" "grep -L qwe input; echo \$?" \
+	"input\n0\n" "asd\n" ""
+testing "grep -L exitcode 0 #2" "grep -L qwe input -; echo \$?" \
+	"(standard input)\n0\n" "qwe\n" "asd\n"
+testing "grep -L exitcode 1" "grep -L qwe input; echo \$?" \
+	"1\n" "qwe\n" ""
+
 optional EGREP
 testing "grep -E supports extended regexps" "grep -E fo+" "foo\n" "" \
 	"b\ar\nfoo\nbaz"